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provisioner.go
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provisioner.go
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package ansiblelocal
import (
"fmt"
"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
"os"
"path/filepath"
)
const DefaultStagingDir = "/tmp/packer-provisioner-ansible-local"
type Config struct {
common.PackerConfig `mapstructure:",squash"`
tpl *packer.ConfigTemplate
// The main playbook file to execute.
PlaybookFile string `mapstructure:"playbook_file"`
// An array of local paths of playbook files to upload.
PlaybookPaths []string `mapstructure:"playbook_paths"`
// An array of local paths of roles to upload.
RolePaths []string `mapstructure:"role_paths"`
// The directory where files will be uploaded. Packer requires write
// permissions in this directory.
StagingDir string `mapstructure:"staging_directory"`
}
type Provisioner struct {
config Config
}
func (p *Provisioner) Prepare(raws ...interface{}) error {
md, err := common.DecodeConfig(&p.config, raws...)
if err != nil {
return err
}
p.config.tpl, err = packer.NewConfigTemplate()
if err != nil {
return err
}
p.config.tpl.UserVars = p.config.PackerUserVars
// Accumulate any errors
errs := common.CheckUnusedConfig(md)
if p.config.StagingDir == "" {
p.config.StagingDir = DefaultStagingDir
}
// Templates
templates := map[string]*string{
"staging_dir": &p.config.StagingDir,
}
for n, ptr := range templates {
var err error
*ptr, err = p.config.tpl.Process(*ptr, nil)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error processing %s: %s", n, err))
}
}
// Validation
err = validateFileConfig(p.config.PlaybookFile, "playbook_file", true)
if err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
for _, path := range p.config.PlaybookPaths {
err := validateFileConfig(path, "playbook_paths", false)
if err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
}
for _, path := range p.config.RolePaths {
if err := validateDirConfig(path, "role_paths"); err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
}
if errs != nil && len(errs.Errors) > 0 {
return errs
}
return nil
}
func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
ui.Say("Provisioning with Ansible...")
ui.Message("Creating Ansible staging directory...")
if err := p.createDir(ui, comm, p.config.StagingDir); err != nil {
return fmt.Errorf("Error creating staging directory: %s", err)
}
ui.Message("Uploading main Playbook file...")
src := p.config.PlaybookFile
dst := filepath.Join(p.config.StagingDir, filepath.Base(src))
if err := p.uploadFile(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading main playbook: %s", err)
}
if len(p.config.RolePaths) > 0 {
ui.Message("Uploading role directories...")
for _, src := range p.config.RolePaths {
dst := filepath.Join(p.config.StagingDir, "roles", filepath.Base(src))
if err := p.uploadDir(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading roles: %s", err)
}
}
}
if len(p.config.PlaybookPaths) > 0 {
ui.Message("Uploading additional Playbooks...")
if err := p.createDir(ui, comm, filepath.Join(p.config.StagingDir, "playbooks")); err != nil {
return fmt.Errorf("Error creating playbooks directory: %s", err)
}
for _, src := range p.config.PlaybookPaths {
dst := filepath.Join(p.config.StagingDir, "playbooks", filepath.Base(src))
if err := p.uploadFile(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading playbooks: %s", err)
}
}
}
if err := p.executeAnsible(ui, comm); err != nil {
return fmt.Errorf("Error executing Ansible: %s", err)
}
return nil
}
func (p *Provisioner) Cancel() {
// Just hard quit. It isn't a big deal if what we're doing keeps
// running on the other side.
os.Exit(0)
}
func (p *Provisioner) executeAnsible(ui packer.Ui, comm packer.Communicator) error {
playbook := filepath.Join(p.config.StagingDir, filepath.Base(p.config.PlaybookFile))
// The inventory must be set to "127.0.0.1,". The comma is important
// as its the only way to override the ansible inventory when dealing
// with a single host.
command := fmt.Sprintf("ansible-playbook %s -c local -i %s", playbook, `"127.0.0.1,"`)
ui.Message(fmt.Sprintf("Executing Ansible: %s", command))
cmd := &packer.RemoteCmd{
Command: command,
}
if err := cmd.StartWithUi(comm, ui); err != nil {
return err
}
if cmd.ExitStatus != 0 {
return fmt.Errorf("Non-zero exit status: %d", cmd.ExitStatus)
}
return nil
}
func validateDirConfig(path string, config string) error {
info, err := os.Stat(path)
if err != nil {
return fmt.Errorf("%s: %s is invalid: %s", config, path, err)
} else if !info.IsDir() {
return fmt.Errorf("%s: %s must point to a directory", config, path)
}
return nil
}
func validateFileConfig(name string, config string, req bool) error {
if req {
if name == "" {
return fmt.Errorf("%s must be specified.", config)
}
}
info, err := os.Stat(name)
if err != nil {
return fmt.Errorf("%s: %s is invalid: %s", config, name, err)
} else if info.IsDir() {
return fmt.Errorf("%s: %s must point to a file", config, name)
}
return nil
}
func (p *Provisioner) uploadFile(ui packer.Ui, comm packer.Communicator, dst, src string) error {
f, err := os.Open(src)
if err != nil {
return fmt.Errorf("Error opening: %s", err)
}
defer f.Close()
if err = comm.Upload(dst, f); err != nil {
return fmt.Errorf("Error uploading %s: %s", src, err)
}
return nil
}
func (p *Provisioner) createDir(ui packer.Ui, comm packer.Communicator, dir string) error {
ui.Message(fmt.Sprintf("Creating directory: %s", dir))
cmd := &packer.RemoteCmd{
Command: fmt.Sprintf("mkdir -p '%s'", dir),
}
if err := cmd.StartWithUi(comm, ui); err != nil {
return err
}
if cmd.ExitStatus != 0 {
return fmt.Errorf("Non-zero exit status.")
}
return nil
}
func (p *Provisioner) uploadDir(ui packer.Ui, comm packer.Communicator, dst, src string) error {
if err := p.createDir(ui, comm, dst); err != nil {
return err
}
// Make sure there is a trailing "/" so that the directory isn't
// created on the other side.
if src[len(src)-1] != '/' {
src = src + "/"
}
return comm.UploadDir(dst, src, nil)
}